Water → Rac-2-chloro-4-[(4r,5s)-4-hydroxy-3,3,5-trimethyl-2-oxopyrrolidin-1-yl]benzonitrile

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Reaction Steps

To a solution of rac-2-chloro-4-[(4R,5S)-4-(tert-butyldimethylsilyloxy)-3,3,5-trimethyl-2-oxopyrrolidin-1-yl]benzonitrile (121 mg) in THF (5.5 mL) was added tetrabutylammonium fluoride-THF solution (0.5 mL, 1 mol/L), and the mixture was stirred at room temperature for 7 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=10/1→1/2) to give the title compound as a colorless solid (yield: 47.2 mg, 55%).

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